A view of the hook echo associated with the Meriden, Kansas, tornado. Observed by the Topeka Weather Bureau WSR-3 radar. Monthly Weather Review, June 1962, p. 236.

A view of the hook echo associated with the Meriden, Kansas, tornado. Observed by the Topeka Weather Bureau WSR-3 radar. Monthly Weather Review, June 1962, p. 236.

A view of the hook echo associated with the Meriden, Kansas, tornado. Observed by the Topeka Weather Bureau WSR-3 radar. Monthly Weather Review, June 1962, p. 237.

Hurricane Carla as seen by WSR-57 radar at Galveston, Texas. Arrow designates location of tornado which occurred near Kaplan, Louisiana. Monthly Weather Review, December 1962, p. 515.

The Weather Bureau's first experimental Doppler Radar unit. This radar was a 3-cm continuous wave Doppler unit obtained from the Navy and modified for meteorological purposes.

Photograph of the "off-set" PPI radar scope at Orlando, Florida. This was the third time that a hurricane had passed sufficiently close to a radar site to have its structure revealed. In: "Weatherwise," Volume 1, No. 4, August 1948, p. 79.

Photograph of the radar scope at Orlando, Florida. Squall line in advance of hurricane that was centered 230 miles southeast of Orlando. In: "Weatherwise," Volume 1, No. 4, August 1948, p. 79.

Classic appearing tornado hook echo on bottom of thunderstorm in lower left quadrant of scope. Apparently a storm in eastern Colorado or southwest Nebraska as Storm Data shows tornadoes only in that area on given date.

Squally weather passing by the Wichita radar installation. Extending from just south of Topeka to Oklahoma City. No violent weather reported with this squall line.

Structure of a typhoon captured by a Navy ship's radar. This storm was the second tropical storm to ever be observed on radar. In: Hurricane Detection by Radar and Other Means", Vaughn D. Rockney, Tropical Cyclone Symposium, Brisbane , December 1956.

Exterior view of radio set SCR-584, a mobile radar unit. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

Operating console of Radio Set SCR-584, a mobile radar unit. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

Artist's conception of radar beam pattern of Radio Set SCR-584, a mobile radar unit. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

Echoes from frontal thunderstorms observed from a Radio Set SCR-584 mobile radar unit located at Spring Lake, New Jersey. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

Forest fire occurring at location of triangle west of Barnegat City. The large echo to the east of Barnegat City was a large cumulonimbus cloud. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

Violent thunderstorm activity and heavy rain to the southwest of Spring Lake preceded a frontal passage In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

An artist's rendition of an MEW (Microwave Early Warning system) and Height Finder. The MEW antenna assembly is in the foreground while a British Type 13 Height Finder is in the background. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

A comparison of fixed echoes at the MEW site and precipitation echoes detected to a range of 150 miles. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

Operational layout of an SCR-615B fixed radar unit. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

Operator's console of SCR-615B fixed radar unit. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

Mobile radar set AN/TPL-1 which was designed for searchlight control. Although only having a range of 60,000 yards, it could still give warning of approaching storms and also be used to track upper wind observation instrument packages. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

Radome and shelter for SCR-717B radar unit on top of weather station. The wind vane, anenometer, and theodolite mount can also be seen in this photograph. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

Control and indicators of SCR-717B radar unit as installed at a weather station. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

Approach of a cold front as observed on an X-Band radar set at Boston in July, 1943. This is perhaps the oldest preserved image of meteorological phenomena as observed by radar. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

A time series of the passage of a typhoon relative to a United States naval vessel in late 1944. In: "AAF Manual 105-101-2 Radar Storm Detection," by Headquarters, Army Air Forces, August 1945. Library Call Number M15:621.384 U58r.

Launching a radiosonde. The man sitting down is tracking the dircection of the balloon with an SCR-658 radio direction finder. In: Flora, Snowden D., 1956. "Hailstorms of the United States. P. 10.

Scale model of new radiotheodolites meant to replace the SCR-658 bed-spring type for tracking balloon carried radiosondes.

Christmas issue of Weather Bureau Topics with Santa Claus streaking across a weather radar. Cover of "Weather Bureau Topics", Vol. 17, No. 12, December 1958.

Christmas issue of Weather Bureau Topics with Santa Claus streaking across a weather radar. Cover of "Weather Bureau Topics", Vol. 17, No. 12, December 1958.

Hurricane Helene as observed by the Weather Bureau radar at Cape Hatteras. At the time of observation the storm was southwest of Cape Hatteras in the vicinity of Cape Fear.

Antenna for new WSR-57 weather radars, the first of which was to be installed in Miami. In: Weather Bureau Topics, February 1958, p. 27.

Weather Bureau electronics specialist Thomas D. Whitely working with a new WSR-57 weather radar antenna.

Weather Bureau electronics specialist Thomas D. Whitely working with a new WSR-57 weather radar antenna.

Radar image showing "bow echo" as squall line approaches Grand Rapids.

A weak squall line bisecting Georgia from east to west.

A stormy night in Indiana, Kentucky,and Tennessee.

A strong squall line with associated gust front (blue reflection) south of strong red and yellow reflections) in northwest Kansas.

A good evening not to be sailing south of Cape Hatteras. Squall line with numerous associated bow echoes.

A narrow squall line nearly bisecting Pennsylvania from north to south.

First rain band from Hurricane Isobel making landfall.

First rain band from Hurricane Isobel making landfall.

Eyewall imaged to southeast as Hurricane Isobel continues moving ashore.

Rainbands from Hurricane Isobel seen from Wakefield, Virginia, radar.

Rainbands and eyewall of Hurricane Isobel seen in its entirety from Newport, North Carolina, radar.

Rainbands from Hurricane Isobel seen from Sterling, Virginia, radar.

Rainbands from Hurricane Isobel seen from Wakefield, Virginia, radar.

Eyewall crossing the Outer Banks southwest of Cape Hatteras. Hurricane Isobel.

Eyewall crossing the Outer Banks southwest of Cape Hatteras. Hurricane Isobel.

Rainbands from Hurricane Isobel seen from Sterling, Virginia, radar.

Eyewall deteriorating after Hurricane Isobel starts moving inland.